Received: from localhost (maia-1.hub.org [200.46.204.191]) by postgresql.org (Postfix) with ESMTP id 13E5B9FB4CF; Fri, 30 Mar 2007 17:36:18 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.191]) (amavisd-maia, port 10024) with ESMTP id 37495-01-3; Fri, 30 Mar 2007 17:36:11 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey-1.7.4 X-Greylist: from auto-whitelisted by SQLgrey-1.7.4 Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by postgresql.org (Postfix) with ESMTP id 0F8929FB521; Fri, 30 Mar 2007 17:36:11 -0300 (ADT) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.13.6/8.13.6) with ESMTP id l2UKZopi023265; Fri, 30 Mar 2007 16:35:50 -0400 (EDT) To: "Simon Riggs" cc: "Richard Huxton" , "Zeugswetter Andreas ADI SD" , "Koichi Suzuki" , josh@agliodbs.com, pgsql-hackers@postgresql.org, pgsql-patches@postgresql.org Subject: Re: [PATCHES] Full page writes improvement, code update In-reply-to: <1175253689.4386.749.camel@silverbirch.site> References: <460886E8.6040907@oss.ntt.co.jp> <4609CAC3.7060008@oss.ntt.co.jp> <1175072848.4386.323.camel@silverbirch.site> <200703291145.28574.josh@agliodbs.com> <1175200117.4386.616.camel@silverbirch.site> <460C611E.6090800@oss.ntt.co.jp> <1175249717.4386.716.camel@silverbirch.site> <460CE5FE.5050906@archonet.com> <1175253689.4386.749.camel@silverbirch.site> Comments: In-reply-to "Simon Riggs" message dated "Fri, 30 Mar 2007 12:21:29 +0100" Date: Fri, 30 Mar 2007 16:35:50 -0400 Message-ID: <23264.1175286950@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200703/1797 X-Sequence-Number: 101281 "Simon Riggs" writes: > Any page written during a backup has a backup block that would not be > removable by Koichi's tool, so yes, you'd still be safe. How does it know not to do that? regards, tom lane